Campbell CS526 Spécifications télécharger pdf (Page 21)

User Manual

• Instability of the reading

• Slow calibration

• Probe will not calibrate

• pH value doesn’t change as expected when changing samples

Additionally, when sampling coloured liquids, the probe should be cleaned when

the reference diaphragm is no longer white.

9.1.2 Cleaning Procedure

Read Section 9.1.2.1, Cleaning Tips, before following this procedure.

1. Place probe in warm tap water (~60°) with a mild detergent and soak for 5

minutes, stir periodically.

2. Scrub the surface of the chip and the diaphragm (Figure 9-1) with a soft

toothbrush and water with a mild detergent (see Caution).

Never brush the probe tip, especially the ISFET chip, before

rinsing and flushing thoroughly with water. Before rinsing

debris and particles may be on the sensor surface and

brushing them into the sensor may damage it. When in

doubt, soak the probe for a while in warm water with a mild

detergent.

Figure 9-1. Tip of the CS526 probe

3. Rinse thoroughly with deionized water.

4. Revitalize the probe (Section 9.1.3, Revitalizing)

5. Calibrate the probe (Appendix C, Calibration).

9.1.2.1 Cleaning Tips

• To avoid scratches on the sensor surface, rinse the probe thoroughly using

water before cleaning the probe with the soft brush supplied with the meter

and tap water with a mild detergent added. Most scratches on the sensor are

caused when there are hard particles in the sample and the sample is rubbed

into the sensor when cleaning with the toothbrush.

CAUTION

Diaphragm

Chip

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Campbell CS526 Spécifications Page 21